212 



Journal of Agricultural Research 



Vol. V, No. s 



Table I. — Results of inoculations with timothy-rust urediniospores on cereals and grasses 



SUMMARY. 



"■ Puccinia graTninis, originally from Hordeum jubalum; on barley 8 urediniospore " generations." 

 *> Puccinia graminis, originally from Dactylis glomerata: on oats 9 urediniospore generations. 

 <^ Dactylis glomerata rust after 13 generations on oats and one generation on Phalaris canariensis. 

 <l The denominator gives the total number of leaves inoculated, the numerator the number 

 developed pustules. 



